Frank Zappa around '78 or '79. My buddy and I had worked long days outside during an extremely hot spell. We got into the A/C, had a bit to smoke, and it was lights out for both of us. We both fell asleep, awoke after a few songs and drove home. At the time, I was familiar with little of his music. Now I kick myself for not sticking it out. I appreciate him a lot more now.